There is also an amazing tool I have found to seal things up nice and good- silicone sealant

for the building of a support for the axis, an extremely simple X shaped bits of wood would suffice, of course there is the problem with motor RPM, that could easily be fixed with pulleys although I do agree that if you have a high RPM motor or plan on using more than 1 mill it would be easier to have a traditional design would be better, although for cheaper mills with smaller motors i think this design would be cheaper and easier to make?
Thanks for all the help.